EP2978990A1 - Floating brake drum and hub assembly - Google Patents
Floating brake drum and hub assemblyInfo
- Publication number
- EP2978990A1 EP2978990A1 EP14726803.1A EP14726803A EP2978990A1 EP 2978990 A1 EP2978990 A1 EP 2978990A1 EP 14726803 A EP14726803 A EP 14726803A EP 2978990 A1 EP2978990 A1 EP 2978990A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brake drum
- hub
- assembly
- flange
- hold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/10—Drums for externally- or internally-engaging brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/0043—Brake maintenance and assembly, tools therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D2065/13—Parts or details of discs or drums
- F16D2065/1304—Structure
- F16D2065/1316—Structure radially segmented
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D2065/13—Parts or details of discs or drums
- F16D2065/134—Connection
- F16D2065/1356—Connection interlocking
- F16D2065/136—Connection interlocking with relative movement radially
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D2065/13—Parts or details of discs or drums
- F16D2065/134—Connection
- F16D2065/1392—Connection elements
Definitions
- the invention relates to brake assemblies, especially vehicular brakes including drum brakes attached to wheel hubs.
- Drum brakes are used in most heavy duty trucks, some medium and light duty trucks, and a few cars, dirt bikes, and ATVs. In some vehicles, drum brakes are applied to the rear wheels since most of the stopping force is generated by the front brakes of the vehicle and therefore the heat generated by the rear is less.
- drum brake Due to the fact that a drum brake's friction contact area is at the circumference of the brake, a drum brake can provide more braking force than an equal diameter disc brake.
- the increased friction contact area of drum brake shoes on the drum allows drum brake shoes to last longer than disc brake pads used in a brake system of similar dimensions and braking force.
- Drum brakes retain heat and are more complex than disc brakes, but are often the more economical and powerful brake type to use in rear brake applications due to the low heat generation of rear brakes, a drum brake self-applying nature, large friction surface contact area, and long life wear characteristics.
- Drum brakes convert kinetic energy into heat by friction. While much of this heat should dissipate into the surrounding air, it can easily transfer to the brake system components. Brake drums must be large to cope with the massive forces involved, and must be able to absorb and dissipate a lot of heat. Excessive heating can occur due to heavy or repeated braking, which can cause the drum to distort, leading to vibration under braking. Another consequence of overheating is brake fade. When the drums are heated by hard braking, the diameter of the drum increases slightly due to thermal expansion, so the shoes must move farther and the driver must press the brake pedal farther. 400086-20035
- a floating brake drum and hub assembly includes a brake drum having a braking surface and an attachment flange; a hub having an outer diameter and a brake drum mounting flange for mounting to the attachment flange of the brake drum; and means for coupling the attachment flange of the brake drum to the brake drum mounting flange of the hub, the means for coupling structured and arranged to allow radial thermal expansion and contraction of at least a portion of the attachment flange of the brake drum and/or at least a portion of the brake drum mounting flange of the hub.
- a method of making a floating brake drum and hub assembly is also provided.
- the brake drum mounting flange of the hub comprises a plurality of threaded brake drum mounting studs and the attachment flange of the brake drum comprises a plurality of corresponding holes.
- the means for coupling comprises a plurality of threaded nuts for threading onto the threaded brake drum mounting studs and forming the assembly. 400086-20035
- the brake drum attachment flange is scalloped to reduce material and provide space for thermal expansion.
- the outer diameter of the hub is sized to provide space for thermal expansion.
- the assembly further comprises a plurality of grommets for mounting within the holes the attachment flange of the brake drum, the plurality of grommets are structured and arranged to provide a degree of thermal isolation between the attachment flange of the brake drum and the brake drum mounting flange of the hub. In some embodiments, the plurality of grommets are structured and arranged to provide additional space for thermal expansion of the attachment flange of the brake drum.
- the attachment flange of the brake drum has a plurality of brake drum tabs.
- the brake drum mounting flange of the hub comprises a plurality of hub tabs for engagement with the brake drum tabs.
- each of the plurality of hub tabs of the brake drum mounting flange further comprises a threaded hold-down ring mounting stud.
- the means for coupling comprises a hold-down ring, the hold-down ring having a plurality of holes to correspond with the threaded hold-down ring mounting studs and a plurality of threaded nuts for threading onto the threaded hold- down ring mounting studs and forming the assembly.
- the means for coupling further comprises a plurality of spacers for placing over the threaded hold-down ring mounting studs and under the hold-down ring to isolate the brake drum tabs from the hold-down ring.
- the means for coupling further comprises a plurality of biasing members for placing onto the brake drum tabs and under the hold-down ring to preload the brake drum tabs.
- each of the plurality of hub tabs of the brake drum mounting flange further comprises an unthreaded hold-down ring mounting stud.
- the means for coupling comprises a hold-down ring, the hold-down ring having a plurality of holes to correspond with the unthreaded hold-down 400086-20035 ring mounting studs and a plurality of lock rings for engaging grooves on the unthreaded hold-down ring mounting studs and forming the assembly.
- the means for coupling further comprises a plurality of spacers for placing over the unthreaded hold-down ring mounting studs and under the hold- down ring to isolate the brake drum tabs from the hold-down ring.
- each of the plurality of hub tabs of the brake drum mounting flange further comprises a flange projection extending in an axial direction and in a radial direction so as to form a plurality of flange projections adapted to receive a snap ring.
- the snap ring is in the form of a multiple turn spiral ring.
- each flange projection extends in an axial direction at the circumferential edge of hub tab and in a radially inward direction, providing an annular aperture, adapted for radially outward and axial-directed constrained seating of the snap ring.
- each flange projection extends in an axial direction at the circumferential edge of hub tab and in a radially outward direction, providing an annular aperture, adapted for radially inward and axial-directed constrained seating of the snap ring.
- the brake drum is attached to a hub without a radial flange that overlaps the wheel mounting face. In some embodiments, the brake drum is attached to a hub with a radial flange of less than 45 mm. In some embodiments, the brake drum is attached to a hub with one or more retaining clips or plates. In some embodiments, the brake drum is attached with a taper on the spring ring for preloading.
- a method of making a floating brake drum and hub assembly includes the steps of providing a brake drum having a braking surface and an attachment flange; providing a hub having an outer diameter and a brake drum mounting flange for mounting to the attachment flange of the brake drum; and coupling the attachment flange of the brake drum to the brake drum mounting flange of the hub by providing a means for coupling structured and arranged to allow radial thermal expansion and contraction of at least a portion of the attachment flange of the brake dram and/or at least a portion of the brake drum mounting flange of the hub.
- FIG. 1 A is a front plan view of a floating brake drum and hub assembly in accordance with an embodiment of the invention
- FIG. IB is a side view in cross section of FIG. 1 A taken along line 1A-1A;
- FIG. 1 C is an enlarged view of section 1 C of FIG. IB;
- FIG. 2 is a perspective view of the embodiment of FIGS. 1 A-1C;
- FIG. 3 A is a front plan view of a floating brake drum and hub assembly in accordance with another embodiment of the invention.
- FIG. 3B is a side view in cross section of FIG. 3 A taken along line 3A-3A;
- FIG. 3C is an enlarged view of section 3C of FIG. 3B;
- FIG. 4 is a perspective view of the embodiment of FIGS. 3A-3C;
- FIG. 5A is a front plan view of a floating brake drum and hub assembly in accordance with another embodiment of the invention.
- FIG. 5B is a side view in cross section of FIG. 5 A taken along line 5A-5A;
- FIG. 5C is an enlarged view of section 5C of FIG. 5B;
- FIG. 6 is a perspective view of the embodiment of FIGS. 5A-5C;
- FIG. 7A is a front plan view of a floating brake drum and hub assembly in accordance with another embodiment of the invention.
- FIG. 7B is a side view in cross section of FIG. 7A taken along line 7A-7A;
- FIG. 7C is an enlarged view of section 7C of FIG. 7B;
- FIG. 8 is a perspective view of the embodiment of FIGS. 7A-7C;
- FIG. 9A is a front plan view of a floating brake drum and hub assembly in accordance with an embodiment of the invention.
- FIG. 9B is a side view in cross section of FIG. 9A taken along line 9A-9A; 400086-20035
- FIG. 9C is an enlarged view of section 9C of FIG. 9B;
- FIG. 10 is a perspective view of the embodiment of FIGS. 9A-9C;
- FIG. 1 1 A is a front plan view of a floating brake drum and hub assembly in accordance with another embodiment of the invention.
- FIG. 1 IB is a side view in cross section of FIG. 1 1A taken along line 1 1 A-
- FIG. 1 1 C is an enlarged view of section 1 1 C of FIG. 1 1 B;
- FIG. 12 is a perspective view of the embodiment of FIGS. 1 lA-1 1C;
- FIG. 13 A is a front plan view of a floating brake drum and hub assembly in accordance with another embodiment of the invention.
- FIG. 13B is a side view in cross section of FIG. 13A taken along line HA-
- FIG. 13C is an enlarged view of section 13C of FIG. 13B;
- FIG. 14 is a perspective view of the embodiment of FIGS. 13A-13C;
- the brake assembly 10 seen in FIG. 1A is preferred for use on vehicles, including automobiles, racing vehicles, trucks, heavy duty trucks, motorcycles and the like.
- the vehicles suitable for use with this invention can include those vehicles having a gross vehicle weight of less than about 5,000 pounds, a gross vehicle weight of about 5,000 pounds to 12,000 pounds, and a gross vehicle weight of more than about 12,000 pounds, for example 30,000 pounds.
- the inventive concepts discussed herein can be used in any type of application that uses rotary brakes, including automotive, other types of motorized vehicles, or railcars.
- FIGS. 1 A-C and 2 a floating brake drum and hub assembly
- the floating brake drum and hub assembly 10 includes a brake drum 12 having a braking surface 14 and an attachment flange 16. Floating brake drum and hub assembly 10 also includes a hub 18 having an outer diameter 20 and a brake drum mounting flange 22 for mounting to attachment flange 16 of brake drum 12.
- Brake drum 12 may be made of cast iron, as those skilled in the art will recognize. For example, a suitable material would be Class 35 cast iron, which has a tensile strength of about 400086-20035
- Hub 18 can be made of cast iron, like the brake drum 12, or if desired, a material having a lower hardness, such as aluminum, may be used.
- brake drum mounting flange 22 of hub 18 includes a plurality of threaded brake drum mounting studs 26.
- attachment flange 16 of brake drum 12 is provided with a plurality of holes 28 for mounting brake drum 12 over the plurality of threaded brake drum mounting studs 26 of hub 18.
- means for coupling 24 includes a plurality of threaded nuts 30 for threading onto threaded brake drum mounting studs 26 and forming the assembly 10.
- means for coupling 24 is structured and arranged to allow for radial thermal expansion and contraction of at least a portion of the attachment flange 16 of the brake drum 12 and/or at least a portion of the brake drum mounting flange 22 of the hub 18.
- brake drum attachment flange 16 may be provided with a plurality of scallops 32 to reduce material and provide space or zone Zl for thermal expansion.
- the outer diameter 20 of hub 18 is sized to provide a space or zone Z2 for thermal expansion.
- FIGS. 3 A-C and 4 a floating brake drum and hub assembly
- the floating brake drum and hub assembly 100 includes a brake drum 1 12 having a braking surface 1 14 and an attachment flange 116.
- Floating brake drum and hub assembly 100 also includes a hub 1 18 having an outer diameter 120 and a brake drum mounting flange 122 for mounting to attachment flange 1 16 of brake drum 1 12.
- brake drum 1 12 may be made of cast iron, as those skilled in the art will recognize.
- a suitable material would be Class 35 cast iron, which has a tensile strength of about 35 ksi and a yield strength of about 28 ksi.
- Hub 1 18 can be made of cast iron, like the brake drum 1 12, or if desired, a material having a lower hardness, such as aluminum, may be used.
- brake drum mounting flange 122 of hub 1 18 includes a plurality of threaded brake drum mounting studs 126.
- attachment flange 1 16 of brake 400086-20035 drum 1 12 is provided with a plurality of holes 128 for mounting brake drum 1 12 over the plurality of threaded brake drum mounting studs 126 of hub 1 18.
- means for coupling 124 includes a plurality of threaded nuts 130 for threading onto threaded brake drum mounting studs 126 and forming the assembly 100.
- means for coupling 124 is structured and arranged to allow for radial thermal expansion and contraction of at least a portion of the attachment flange 1 16 of the brake drum 1 12 and/or at least a portion of the brake drum mounting flange 122 of the hub 1 18.
- brake drum attachment flange 1 16 may be provided with a plurality of scallops 132 to reduce material and provide space or zone Zl for thermal expansion.
- the outer diameter 120 of hub 1 18 is sized to provide a space or zone Z2 for thermal expansion.
- assembly 100 also includes a plurality of grommets 134 for mounting within the holes 128 of attachment flange 1 16 of brake drum 112.
- the plurality of grommets 134 may be structured and arranged to provide a degree of thermal isolation between attachment flange 1 16 of brake drum 1 12 and brake drum mounting flange 1 12 of hub 1 18.
- the plurality of grommets 134 may be structured and arranged to provide an additional space or zone for thermal expansion of attachment flange 1 16 of brake drum 1 12.
- Grommets 134 may be produced from a wide variety of materials, including metals, such as steel or aluminum, or polymeric materials, depending upon the service to be encountered.
- FIGS. 5A-C and 6 a floating brake drum and hub assembly
- the floating brake drum and hub assembly 200 includes a brake drum 212 having a braking surface 214 and an attachment flange 216.
- Floating brake drum and hub assembly 200 also includes a hub 218 having an outer diameter 220 and a brake drum mounting flange 222 for mounting to attachment flange 216 of brake drum 212.
- brake drum 212 may be made of cast iron, as those skilled in the art will recognize.
- a suitable material would be Class 35 cast iron, which has a tensile strength of about 35 ksi and a yield strength of about 28 ksi.
- Hub 218 can be made of cast iron, like the brake drum 212, or if desired, a material having a lower hardness, such as aluminum, may be used. 400086-20035
- brake drum mounting flange 222 of hub 218 includes a plurality of hub tabs 236.
- each hub tabs 236 includes a threaded hold-down ring mounting stud 226.
- attachment flange 216 of brake drum 212 is provided with a plurality of brake drum tabs 238 for engagement with the hub tabs 236. In the embodiment depicted in FIGS.
- 5A-C and 6 means for coupling 224 includes a hold-down ring 240, the hold-down ring having a plurality of holes 246 spaced about so as to correspond with threaded hold-down ring mounting studs 226 and a plurality of threaded nuts 230 for threading onto threaded hold-down ring mounting studs 226 and forming the assembly 200.
- means for coupling 224 is structured and arranged to allow for radial thermal expansion and contraction of at least a portion of the attachment flange 216 of the brake drum 212 and/or at least a portion of the brake drum mounting flange 222 of the hub 218.
- means for coupling 224 may further include a plurality of biasing members (not shown) for placing onto the brake drum tabs 238 to preload brake drum tabs 238.
- a plurality of spacers (not shown) for placing over the threaded hold-down ring mounting studs 226 and under the hold-down ring 240 may thermally isolate brake drum tabs 238 from hold-down ring 240.
- FIGS. 7A-C and 8 a floating brake drum and hub assembly
- the floating brake drum and hub assembly 300 includes a brake drum 312 having a braking surface 314 and an attachment flange 316.
- Floating brake drum and hub assembly 300 also includes a hub 318 having an outer diameter 320 and a brake drum mounting flange 322 for mounting to attachment flange 316 of brake drum 312.
- brake drum 312 may be made of cast iron, as those skilled in the art will recognize.
- a suitable material would be Class 35 cast iron, which has a tensile strength of about 35 ksi and a yield strength of about 28 ksi.
- Hub 318 can be made of cast iron, like the brake drum 312, or if desired, a material having a lower hardness, such as aluminum, may be used.
- brake drum mounting flange 322 of hub 318 includes a plurality of hub tabs 336.
- each hub tab 336 includes an unthreaded hold-down ring mounting stud 326.
- attachment flange 316 of brake drum 312 is provided with a plurality of brake drum tabs 338 for engagement with the hub tabs 336. In the embodiment depicted in FIGS.
- 7A-C and 8 means for coupling 324 includes a hold-down ring 340, the hold-down ring having a plurality of holes 346 spaced about so as to correspond with unthreaded hold-down ring mounting studs 326 and a plurality of lock rings 330 for engaging grooves 350 on the unthreaded hold-down ring mounting studs 326 and forming the assembly 300.
- means for coupling 324 is structured and arranged to allow for radial thermal expansion and contraction of at least a portion of the attachment flange 316 of the brake drum 312 and/or at least a portion of the brake drum mounting flange 322 of the hub 318.
- means for coupling 324 may further include a plurality of biasing members (not shown) for placing onto the brake drum tabs 338 to preload brake drum tabs 338.
- a plurality of spacers (not shown) for placing over the threaded hold-down ring mounting studs 326 and under the hold-down ring 340 may thermally isolate brake drum tabs 338 from hold-down ring 340.
- FIGS. 9A-C and 10 a floating brake drum and hub assembly
- the floating brake drum and hub assembly 400 includes a brake drum 412 having a braking surface 414 and an attachment flange 416.
- Floating brake drum and hub assembly 400 also includes a hub 418 having an outer diameter 420 and a brake drum mounting flange 422 for mounting to attachment flange 416 of brake drum 412.
- brake drum 412 may be made of cast iron, as those skilled in the art will recognize.
- a suitable material would be Class 35 cast iron, which has a tensile strength of about 35 ksi and a yield strength of about 28 ksi.
- Hub 418 can be made of cast iron, like the brake drum 412, or if desired, a material having a lower hardness, such as aluminum, may be used.
- brake drum mounting flange 422 of hub 418 includes a plurality of hub 400086-20035 tabs 436.
- each hub tab 436 includes a flange projection 452 extending in an axial direction and in a radial direction so as to form a plurality of flange projections 452 adapted to receive a snap ring 454.
- Attachment flange 416 of brake drum 412 is provided with a plurality of brake drum tabs 438 for engagement with the hub tabs 436.
- means for coupling 424 includes snap ring 454 for engaging the plurality of flange projections 452 and forming the assembly 400.
- each flange projection 452 extends in an axial direction at the circumferential edge of each hub tab 436 and in a radially inward direction, providing an annular aperture, adapted for radially outward and axial-directed constrained seating of snap ring 454.
- snap ring 454 is configured in the form of a multiple turn spiral ring. As may be appreciated, this form enables the snap ring 454 to be made so that its two ends are not adjacent each other, making for a more secure engagement.
- means for coupling 424 is structured and arranged to allow for radial thermal expansion and contraction of at least a portion of the attachment flange 416 of the brake drum 412 and/or at least a portion of the brake drum mounting flange 422 of the hub 418.
- the floating brake drum and hub assembly 500 includes a brake drum 512 having a braking surface 514 and an attachment flange 516.
- Floating brake drum and hub assembly 500 also includes a hub 518 having an outer diameter 520 and a brake drum mounting flange 522 for mounting to attachment flange 516 of brake drum 512.
- brake drum 512 may be made of cast iron, as those skilled in the art will recognize.
- a suitable material would be Class 35 cast iron, which has a tensile strength of about 35 ksi and a yield strength of about 28 ksi.
- Hub 518 can be made of cast iron, like the brake drum 512, or if desired, a material having a lower hardness, such as aluminum, may be used.
- brake drum mounting flange 522 of hub 518 includes a plurality of hub tabs 536.
- each hub tab 536 includes a flange projection 552 extending in an axial direction and in a radial direction so as to form a plurality of flange projections 552 adapted to receive a snap ring 554.
- Attachment flange 516 of brake drum 512 is 400086-20035 provided with a plurality of brake drum tabs 538 for engagement with the hub tabs 536. In the embodiment depicted in FIGS.
- means for coupling 524 includes snap ring 554 for engaging the plurality of flange projections 552 and forming the assembly 500.
- each flange projection 552 extends in an axial direction at the circumferential edge of each hub tab 536 and in a radially inward direction, providing an annular aperture, adapted for radially outward and axial-directed constrained seating of snap ring 554.
- snap ring 554 is configured in the form of a multiple turn spiral ring. As may be appreciated, this form enables the snap ring 554 to be made so that its two ends are not adjacent each other, making for a more secure engagement.
- means for coupling 524 is structured and arranged to allow for radial thermal expansion and contraction of at least a portion of the attachment flange 516 of the brake drum 512 and/or at least a portion of the brake drum mounting flange 522 of the hub 518.
- brake drum tabs 538 are provided with a tapered surface 556. This serves to preload brake drum tabs 538 against snap ring 554, reducing unwanted noise and chatter associated with a looser fit.
- the floating brake drum and hub assembly 600 includes a brake drum 612 having a braking surface 614 and an attachment flange 616.
- Floating brake drum and hub assembly 600 also includes a hub 618 having an outer diameter 620 and a brake drum mounting flange 622 for mounting to attachment flange 616 of brake drum 612.
- brake drum 612 may be made of cast iron, as those skilled in the art will recognize.
- a suitable material would be Class 35 cast iron, which has a tensile strength of about 35 ksi and a yield strength of about 28 ksi.
- Hub 618 can be made of cast iron, like the brake drum 612, or if desired, a material having a lower hardness, such as aluminum, may be used.
- brake drum mounting flange 622 of hub 618 includes a plurality of hub tabs 636.
- each hub tab 636 includes a flange projection 652 extending in an axial direction and in a radial direction so as to form a plurality of flange projections 400086-20035
- means for coupling 624 includes snap ring 654 for engaging the plurality of flange projections 652 and forming the assembly 600.
- each flange projection 652 extends in an axial direction at the circumferential edge of each hub tab 636 and in a radially outward direction, providing an annular aperture, adapted for radially inward and axial-directed constrained seating of snap ring 654.
- At least one pin 660 for securing the snap ring 654 to the hub 618 may be provided.
- snap ring 654 is configured in the form of a multiple turn spiral ring. As may be appreciated, this form enables the snap ring 654 to be made so that its two ends are not adjacent each other, making for a more secure engagement.
- means for coupling 624 is structured and arranged to allow for radial thermal expansion and contraction of at least a portion of the attachment flange 616 of the brake drum 612 and/or at least a portion of the brake drum mounting flange 622 of the hub 618.
- brake drum tabs 638 may be provided with a tapered surface. This serves to preload brake drum tabs 638 against snap ring 654, reducing unwanted noise and chatter associated with a looser fit.
- a method of making a floating brake drum and hub assembly includes the steps of providing a brake drum having a braking surface and an attachment flange; providing a hub having an outer diameter and a brake drum mounting flange for mounting to the attachment flange of the brake drum; and coupling the attachment flange of the brake drum to the brake drum mounting flange of the hub by providing a means for coupling structured and arranged to allow radial thermal expansion and contraction of at least a portion of the attachment flange of the brake drum and/or at least a portion of the brake drum mounting flange of the hub.
- brake shoes are selectively pressed against the braking surface of brake drum to slow or stop rotation of brake drum, and thus slow or stop rotation of the wheel hub and vehicle wheel. 400086-20035
- This invention offers the advantage of a lower brake drum failure rate and accommodates thermal expansion of the brake drum. In some embodiments disclosed herein, rattling is eliminated.
- this invention yields outstanding weight reduction, resulting in the ability to carry larger loads and/or improve fuel economy.
- Drum 1 79.00 79.00 102.0 102.0
- drum brake and hub assemblies disclosed herein can be used c automobiles, light-duty trucks, classes 4, 5, 6, 7, and 8 trucks, off road vehicles, such as all terrain vehicles, and earth moving equipment.
- the invention can be applied to any motorized vehicle. It is further contemplated that this invention can be used in a railway environment on railcars.
- the term "and/or" placed between a first entity and a second entity means one of (1) the first entity, (2) the second entity, and (3) the first entity and the second entity.
- Multiple entities listed with “and/or” should be construed in the same manner, i.e., "one or more" of the entities so conjoined.
- Other entities may optionally be present other than the entities specifically identified by the "and/or” clause, whether related or unrelated to those entities specifically identified.
- a reference to "A and/or B,” when used in conjunction with open-ended language such as “comprising” may refer, in one embodiment, to A only (optionally including entities other than B); in another embodiment, to B only (optionally including entities other than A); in yet another embodiment, to both A and B (optionally including other entities).
- These entities may refer to elements, actions, structures, steps, operations, values, and the like.
- the phrase "at least one,” in reference to a list of one or more entities should be understood to mean at least one entity selected from any one or more of the entity in the list of entities, but not necessarily including at least one of each and every entity specifically listed within the list of entities and not excluding any combinations of entities in the list of entities.
- This definition also allows that entities may optionally be present other than the entities specifically identified within the list of entities to which the phrase "at least one" refers, whether related or unrelated to those entities specifically identified.
- At least one of A and B may refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including entities other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including entities other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other entities).
- each of the expressions “at least one of A, B and C,” “at least one of A, B, or C,” “one or more of A, B, and C,” “one or more of A, B, or C” and “A, B, and/or C” may mean A alone, B alone, C alone, A and B together, A and C together, B and C together, A, B and C together, and optionally any of the above in combination with at least one other entity.
- adapted and “configured” mean that the element, component, or other subject matter is designed and/or intended to perform a given function.
- the use of the terms “adapted” and “configured” should not be construed to mean that a given element, component, or other subject matter is simply “capable of performing a given function but that the element, component, and/or other subject matter is specifically selected, created, implemented, utilized, programmed, and/or designed for the purpose of performing the function.
- elements, components, and/or other recited subject matter that is recited as being adapted to perform a particular function may additionally or alternatively be described as being configured to perform that function, and vice versa.
- a floating brake drum and hub assembly comprising a brake drum having a braking surface and an attachment flange; a hub having an outer diameter and a brake drum mounting flange for mounting to the attachment flange of the brake drum; and means for coupling the attachment flange of the brake drum to the brake drum mounting 400086-20035 flange of the hub, the means for coupling structured and arranged to allow radial thermal expansion and contraction of at least a portion of the attachment flange of the brake drum and/or at least a portion of the brake drum mounting flange of the hub.
- each of the plurality of hub tabs of the brake drum mounting flange further comprises a threaded hold-down ring mounting stud.
- each of the plurality of hub tabs of the brake drum mounting flange further comprises an unthreaded hold-down ring mounting stud.
- A15 The assembly of paragraph A14, wherein the means for coupling comprises a hold-down ring, the hold-down ring having a plurality of holes to correspond with the unthreaded hold-down ring mounting studs and a plurality of lock rings for engaging grooves on the unthreaded hold-down ring mounting studs and forming the assembly.
- A17 The assembly of paragraph A15, wherein the means for coupling further comprises a plurality of biasing members for placing onto the brake drum tabs and under the hold-down ring to preload the brake drum tabs.
- each of the plurality of hub tabs of the brake drum mounting flange further comprises a flange projection extending in an axial direction and in a radial direction so as to form a plurality of flange projections adapted to receive a snap ring.
- each flange projection extends in an axial direction at the circumferential edge of hub tab and in a radially inward direction, providing an annular aperture, adapted for radially outward and axial-directed constrained seating of the snap ring.
- each flange projection extends in an axial direction at the circumferential edge of hub tab and in a radially outward direction, providing an annular aperture, adapted for radially inward and axial-directed constrained seating of the snap ring.
- a method of making a floating brake drum and hub assembly comprising providing a brake drum having a braking surface and an attachment flange; providing a hub having an outer diameter and a brake drum mounting flange for mounting to the attachment flange of the brake drum; and coupling the attachment flange of the brake drum to the brake drum mounting flange of the hub by providing a means for coupling structured and arranged to allow radial thermal expansion and contraction of at least a portion of the attachment flange of the brake drum and/or at least a portion of the brake drum mounting flange of the hub.
- each of the plurality of hub tabs of the brake drum mounting flange further comprises a threaded hold-down ring mounting stud.
- Bl 1. The method of paragraph B10, wherein the means for coupling comprises a hold-down ring, the hold-down ring having a plurality of holes to correspond with the threaded hold-down ring mounting studs and a plurality of threaded nuts for threading onto the threaded hold-down ring mounting studs and forming the assembly.
- each of the plurality of hub tabs of the brake drum mounting flange further comprises an unthreaded hold-down ring mounting stud.
- each of the plurality of hub tabs of the brake drum mounting flange further comprises a flange projection extending in an axial direction and in a radial direction so as to form a plurality of flange projections adapted to receive a snap ring.
- each flange projection extends in an axial direction at the circumferential edge of hub tab and in a radially inward direction, providing an annular aperture, adapted for radially outward and axial-directed constrained seating of the snap ring.
- each flange projection extends in an axial direction at the circumferential edge of hub tab and in a radially outward direction, providing an annular aperture, adapted for radially inward and axial-directed constrained seating of the snap ring.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361805886P | 2013-03-27 | 2013-03-27 | |
PCT/US2014/032062 WO2014160888A1 (en) | 2013-03-27 | 2014-03-27 | Floating brake drum and hub assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2978990A1 true EP2978990A1 (en) | 2016-02-03 |
Family
ID=50829251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14726803.1A Withdrawn EP2978990A1 (en) | 2013-03-27 | 2014-03-27 | Floating brake drum and hub assembly |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160053838A1 (en) |
EP (1) | EP2978990A1 (en) |
JP (1) | JP2016519744A (en) |
WO (1) | WO2014160888A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014160889A1 (en) * | 2013-03-27 | 2014-10-02 | Performance Friction Corporation | Floating brake drum and hat assembly |
DE102015212017B4 (en) * | 2015-06-29 | 2019-06-06 | Saf-Holland Gmbh | brake drum |
DE102018106297B4 (en) | 2018-03-19 | 2021-05-27 | Saf-Holland Gmbh | Multi-part brake drum |
CN109372914B (en) * | 2018-12-14 | 2020-06-02 | 福建海工车桥制造有限公司 | Intelligent drum brake device for automobile |
DE102019213756A1 (en) | 2019-01-11 | 2020-07-16 | Continental Teves Ag & Co. Ohg | Cup-shaped compound brake rotor for motor vehicles |
EP3980660A1 (en) * | 2019-06-04 | 2022-04-13 | Volvo Truck Corporation | A brake drum system for a wheel of a vehicle |
JP7310683B2 (en) * | 2020-03-31 | 2023-07-19 | 株式会社豊田自動織機 | Installation method of industrial vehicle and drum brake device for industrial vehicle |
CN114562526B (en) * | 2022-03-01 | 2024-01-23 | 山东倍瑞恳新材料有限公司 | Split type rail vehicle brake disc convenient to dismantle and change |
Citations (2)
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US2066395A (en) * | 1931-10-29 | 1937-01-05 | Budd Wheel Co | Brake drum |
US2123614A (en) * | 1936-06-08 | 1938-07-12 | Kelsey Hayes Wheel Co | Brake drum |
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US2099833A (en) * | 1934-08-13 | 1937-11-23 | Motor Wheel Corp | Brake drum construction |
US3500972A (en) * | 1968-06-14 | 1970-03-17 | Motor Wheel Corp | Sintered metal brakedrum |
SE7503574L (en) * | 1974-04-01 | 1975-10-02 | Girling Ltd | |
JPS62141935U (en) * | 1986-02-28 | 1987-09-08 | ||
JPH0611379Y2 (en) * | 1990-03-26 | 1994-03-23 | 日信工業株式会社 | Disc brake disc rotor support structure |
DE19727333C2 (en) * | 1997-06-27 | 2002-09-26 | Porsche Ag | brake disc |
AT409532B (en) * | 2000-06-15 | 2002-09-25 | Ellergon Antriebstech Gmbh | CLUTCH LIMBS |
ATE297511T1 (en) * | 2001-09-28 | 2005-06-15 | Freni Brembo Spa | BRAKE SYSTEM WITH SLIDING BRAKE DISC |
JP2003148526A (en) * | 2001-11-14 | 2003-05-21 | Nsk Ltd | Wheel support bearing unit for automobile |
US7703584B2 (en) * | 2004-10-25 | 2010-04-27 | Wolfgang Weiss | Divided disk brake arrangement |
JP2007085393A (en) * | 2005-09-20 | 2007-04-05 | Nsk Ltd | Rolling bearing unit for supporting wheel |
US20080217116A1 (en) * | 2005-10-28 | 2008-09-11 | Brembo Ceramic Systems S.P.A. | Parking Brake |
US7654365B2 (en) * | 2006-02-21 | 2010-02-02 | Lamb Roger A | Two-piece floating disc brake assembly |
GB2451880A (en) * | 2007-08-16 | 2009-02-18 | Walter Emil Saunders | Brake disc assembly the disc being quickly releasable from the wheel |
US8197189B2 (en) * | 2007-11-27 | 2012-06-12 | Pratt & Whitney Canada Corp. | Vibration damping of a static part using a retaining ring |
WO2014160889A1 (en) * | 2013-03-27 | 2014-10-02 | Performance Friction Corporation | Floating brake drum and hat assembly |
-
2014
- 2014-03-27 EP EP14726803.1A patent/EP2978990A1/en not_active Withdrawn
- 2014-03-27 JP JP2016505573A patent/JP2016519744A/en active Pending
- 2014-03-27 WO PCT/US2014/032062 patent/WO2014160888A1/en active Application Filing
- 2014-03-27 US US14/780,902 patent/US20160053838A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2066395A (en) * | 1931-10-29 | 1937-01-05 | Budd Wheel Co | Brake drum |
US2123614A (en) * | 1936-06-08 | 1938-07-12 | Kelsey Hayes Wheel Co | Brake drum |
Non-Patent Citations (1)
Title |
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See also references of WO2014160888A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2016519744A (en) | 2016-07-07 |
WO2014160888A1 (en) | 2014-10-02 |
US20160053838A1 (en) | 2016-02-25 |
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